We've all experienced that moment of panic when we open the back door to let the dog inside only to find that he's not there. Technology has provided a solution to this dilemma with GPS tracking devices designed specifically for our four-legged friends entering the market in recent years, but this offering from GEODOG claims to improve on those that have gone before with a new slimline design that's shockproof, waterproof, user-friendly and unobtrusive.